TKG..Didn't see those, but Dan Santich stopped by my shop many years ago on his way to race at Madera...He had spent some time with Stinger Wallace and said he could make his engine look just like Stingers...He used my porting tools and made a peek a boo engine out of his...Wouldn't run at all, we had to get a new cylinder....
I would like to see someone get another 1000 rpm from my G26 on gas without using a pipe and still have it useable at anything but WOT..
If port timing alone would work there would be thousands of performance engines built that way..Can't be done....
ALL racing two strokes use tuned pipes.....